feat: Move videoplayer into multi image viewer

Also fixes video thumbnails

Signed-off-by: Christian Kußowski <c.kussowski@famedly.com>

lib/pages/image_viewer/image_viewer.dart

@@ -33,7 +33,13 @@ class ImageViewerController extends State<ImageViewer> {
   void initState() {
     super.initState();
     allEvents = widget.timeline?.events
-            .where((event) => event.messageType == MessageTypes.Image)
+            .where(
+              (event) => {
+                MessageTypes.Image,
+                MessageTypes.Sticker,
+                if (PlatformInfos.supportsVideoPlayer) MessageTypes.Video,
+              }.contains(event.messageType),
+            )
             .toList()
             .reversed
             .toList() ??